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Frequency-Comb-Assisted Terahertz Quantum Cascade Laser Spectroscopy

  Articoli su Riviste JCR/ISI  (anno 2014)

Autori:  Bartalini S., Consolino L., Cancio P., De Natale P., Bartolini P., Taschin A., De Pas M., Beere H., Ritchie D., Vitiello M. S., Torre R

Affiliazione Autori:  INO, Istituto Nazionale di OtticaŚCNR, Largo Fermi 6, 50125 Firenze, Italy; LENS, European Laboratory for Non-linear Spectroscopy, Via Carrara 1, 50019 Sesto Fiorentino, Italy; Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom; NEST, Istituto NanoscienzeŚCNR and Scuola Normale Superiore, Piazza San Silvestro 12, 56127 Pisa, Italy; Dipartimento di Fisica e Astronomia, UniversitÓ di Firenze, Via Sansone 1, 50019 Sesto Fiorentino, Italy

Riassunto:  We report a metrological-grade THz spectroscopy based on the combination of a THz frequency-comb synthesizer (FCS) and a THz quantum cascade laser (QCL). The QCL, emitting at 2.5 THz, is phase locked to the free-space THz FCS, and its frequency is swept across a methanol transition by tuning the comb-repetition rate, which is ultimately disciplined by the Cs primary frequency standard. The absolute frequency scale provides an uncertainty of a few parts in 10(-11) on the laser frequency and 10(-9) on the line-center determination, ranking this technique among the most precise ever developed in the THz range.

Rivista/Giornale:  PHYSICAL REVIEW X
Volume n.:  4 (2)      Pagine da: 021006  a: 021006
Ulteriori informazioni:  This work was partly supported by the Italian Ministry of Education, University, and Research (MIUR) through the program FIRB-Futuro in Ricerca 2010 RBFR10LULP fundamental research on terahertz photonic devices, by the Extreme Light Infrastructure (ELI) EU roadmap project and by LASERLAB-EUROPE (Grant No. 284464, EC\'s Seventh Framework Programme). We acknowledge D. Mazzotti and M. Prevedelli for their valuable contribution and discussions.
DOI: 10.1103/PhysRevX.4.021006

*Impact Factor della Rivista: (2014) 9.043   *Citazioni: 49
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  26/05/2019

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